Pump



Jan, 6, 1925.

J. l.. sHAFl-:R

PUMP

Filed 001;. 15, 1923 S S m n W Patented Jan. 6, 1925i- UNITED STATES i y1,521,718 PATENT oFFicE.

` JOHN LIONEL SHAFER, OF J'OPLIN, MISSOURI.

PUMP.

Application led October 15, 1923. Serial No. 668,681. t

- December 13, 1921.

Briefly stated an important objectl is to provide a pump and operating'means therefor for use in mines and other places where the power unitcannot be conveniently placed close to the pumping mechanism.

Further an important object is to provide a novel equalizing mechanismby means of which the pressure and quantity of liquid in the severalconduits is equalized.

Also, the invention forming the subject matter of this application aimsto provide a pumping mechanism of the character specified which employsstandard couplings and Yother parts so far as practical so as to reducethe cost of production to a minimum.

Other objects andv advantages will be apparent during the course of thefollowing description.

In the accompanying drawings forming a part of this application and inwhich like numerals are employed to designate like parts throughout thesame, Y

Figure 1 is a side elevation illustrating the ower unit.

Figure 2 is a detail sectional view through a valve embodied in theinvention. A

Figure 3 is a detail longitudinal 'sectional view throughl one of theprimary pumps.

Figure 4 is a sectional view through an equalizing mechanism.

Figure 5 is a sectional view through a pump embodied in the inventionand which is operated by the construction illustrated in Y Figure 1.

Figure 6 is an end view of-the pump, parts being shown in section. Y 0

Figure 7 is a fra entary plan v1evv of a valve embodied in t einvention.

In the drawing wherein for the purpose of illustration is shown apreferred embodiment of the invention the numeral 5 generally designatesa base upon which a pair of aligned cylinders 6 are secured and Figure l3 illustratesthat a piston 7 is slidable in each cylinder so as to causefluid in the conduits 8 and 10 to move back and forth under theinfluence of the pistons. That is to say the conduits 8 and 10 areconnected to the outer ends of the cylinders 6 and when the pistons 7are reciprocated the fluid -in the conduits;v

will be moved back and forth for operating? -1 a pump to be fullyhereinafterldescribed.

Figure 1 illustrates that the pistonslfha connection with a rod 14, theintermediate' portion of which is provided with an enlargement 16through which a pitman rod 17 is connected. One end of the pitman rod isconnected to a crank 18 mounted on a shaft 19 and the shaft 19 hasconnection through the medium of gears 20 and 21 with a powertransmitting wheel 22. A belt or other power transmitting means may beconnected to the wheel 22 so as to operate the prima-ry pump and therebyforce the Huid` back and forth in the conduits 8 and 10.

In carrying out the invention the elbows 23 and 24 which join theconduits to the outer ends of the pistons are provided with replenishingpipes 26 in which one way valves 27 are interposed. The pipes 26 haveconnection with a reservoir 28 through the medium of a pipe 30 and whenthe supplyl of fluid in one of the conduits drops below a predeterminedpoint the iap in one of the valves 27 is opened and a quantity of Huidis supplied to the conduit. Inkotherywords when the pressure of thefluid in one of the conduits drops below rthe pressure of the water inthe reservoir 28 additional water is supplied from the conduit. In thismani' ner lost motion of the moving'parts of the pump is reduced to aminimum and consequently the eiiciency of the mechanism is maintained ata high point. However, in carrying out the invention additionalreservoirs and one-way valves may be connected to the conduits. at anypoint between the primary and secondary pumps so that the water supplymay be replenished at any point. This is especially useful where the.

provided with flanges which atly abut the flanges 42 of elbows 43 'andthe flanges 140 and 42 are joined by fastening devices 44. The pumpcasing 40 is provided with heads 46 and 48 and Figure 5 illustrates thatvalve supporting walls 50 are confined between the pump casing and theheads 46 and 48 and the said valve supporting walls 5() cooperate withthe casing 40in deiining an KVeo enclosure in which a quantity of liquidis confined.

More specifically the pump casing'is divided by means of a transversepartition 52 into two chambers 53 and it will be seen that the member 52not only constitutes a partition but also acts as a supporting means fora central cylinder54.

The heads 46 and 48 are provided with chambers which communicate withthe chambers 53 through the medium ofv openings 57 in the valvesupporting plates 50 and the said openings are normally closed by valves58. The valves 58 are urged to their closed positions by means ofsprings 59 and when the pressure is in one direction the valves areopened and when the pressure is in the other direction the valves areclosed.

The heads 46 and 48 have connection with a suction or inlet pipe 60While the heads 46 have connection with an outlet pipe 61 which mayextend to a suitable point of discharge. y

The water in the conduits 8 and 10 acts on auxiliary pistons 64 slidablein the cylinders 37 and the pistons 64 have connection with a pair ofpiston rods 66 the inneryportion's of which are joined to a4 main piston67 slidable in the cylinder 54. It will be seeny that when the mainpiston 67 is reciprocated the volume of one of tlfe chambers 53 isdecreased and the volume of the other chamber 1s increased andconsequently a pumping actlon takes place. When the piston is moved tothe left one of the inlet valves 59 1s closed and the other -is openedso that liquid may be sucked into one of the cham-v Simultaneously withthis, one of the outlet valves 58 is closed and one is opened so thatthe liquid pumped out of one of the chambers 53 isdirected into thedischarge head 46.

Each cylinder 37 is provided with a tubular extension 69 which extendsinto the chamber 53 'and constitutes a guide for a sprmgfm arranged inthe path of travel of t e main piston 67 so as to cushion the action ofthe same'. v

An additional equalizing mechanism is illustrated in Figure 4 whereinthe numeral designates a pipe establishing communication betweentheconduits 8 and 1() and T-couplings 76 aref interposed in the pipe 75 andhave connection with the ends of a bvpass p1pe 77. Figure 4 clearlyillustrates the by-pass pipe 77 and associated elements and alsolndicates that the pipe 75 is provided with a one-way valve 7 8 whichallows the excess liquid in one of the conduits to pass through the pine75 and into a pressure relief Valve 80.

The by-pass pipe 77- is provided on opposite sides of the relief valve80 with one-way valves 81 and 82 which allow the liquid which passesthrough the relief valve from one conduit to pass into the other conduitand thereby maintain the liquid in the several conduits more or lessequalized.

Assuming there is an excess quantity of liquid in the conduit 8 theone-way valve 78 at the upper right hand corner of Figure 4 will beopened and the other valve 78 in the pipe 75 will remain closed.Therefore the liquid will flow intoand through the spring actuatedrelief valve 80 and the liquid will flow through the one-way valve 82and again into the pipe 75 so that the liquid will enter the conduit 10.Of course if there is an excess quantity of liquid in the conduit 104 itwill flow into the conduit 8.

In operation the pump rods 14 may be operated either by power or by handso as to reciprocate the pistons 7 and this will cause the liquids inthe conduits 8 and 10 to iiow back and forth.v This movement of theliquid in the conduits 8 and 10 will reciprocate the pistons 64`so thatthe corresponding movement is imparted to the main piston 67. Themovement of the main piston 67 and the pressure actuated pistons 64 willVary the volume of the chamber 53 so that a pumping action takes placein the said chambers whereby the liquid is pumped through the pipe 60and out through the pipe 61. Y

In conclusion it is rdesired to point out that the invention forming thesubject matter of this application is capable of use in connection withany make and design of reciprocating pump. There area great manydifferent designs. of reciprocating pumps designed to be operated bydirect power by attaching the pump piston/ direct to a steam engine, orby a connecting rod to a crank shaft of some other power unit and inthis case the power is. necessarily installed with the pump.

In accordance withl this invention the pump may be located at a pointremote from the source of power and by the pressure in the conduits 8and 10 the pump may be operated.

Practically all reciprocating pump cases are formed with openings atopposite ends of the pump cylinder, one end being open for the stuingboxor connecting rod and the otherend being open for removing or packingthe piston or plunger. However all pumps do'not have the same sizedopen-Y ings at both ends, but both ends are spaced. drilled and tappedfor Hanged connections and it is one of the principal objects of thisinvention to so form the fianges 39 of the cylinders 37 so that they maybe connected to the spaced ends of the pump casing. In other words whenmodifying a standard pump case for use in connection with this inventionthe members connected to the spaced ends of the casing are removed andcylinders 37 with the proper size flanges 39 are fitted.

When the parts are assembled as illustrated in Figure the reciprocatingpump may be operated from a remote point and' at any angle from thepower.

Having thus described the invention, what is claimed is 1. In a pump, apair of pressure conduits, a pipe connecting said conduits, a by-passpipe connected at its end and at its intermediate portion to said firstnamed pipe, and one-way valves located in the first 4named pipe and inthe bypass pipe between the end and intermediate connection. v

2. `A pump of the character specified com risin a air of pressureconduits pumping cylinders connected to said conduits, a' pipe connectedto said conduits, a by-pass `pipe connected at its ends to said firstnamed pipes and having spaced oneway valves, said. first named pipesbeing provided with one-way valves between the ends of said by-passpipe, and a relief valve establishing communication between theintermediate portions of said first and secv ond named pipes and beinglocated between the valves in the pipes.

3. A pump of Ithe character specified comprising a pair l of pressureconduits,

l pumping cylinders connected to said conduits, a pipe connected to saidconduits, a by-pass pipe connected at its ends to said first named pipesand having spaced oneway valves, said first named pipes being providedwith one-way valves between the ends of said by-pass pipe, a reliefvalve establishing communication between the intermediate portions ofsaid first and second named pipes and being located between the valvesin the pipes, and a reservoir having pipes connected to said conduits.

4. A pump of the character specified comprising a pair of pressureconduits, pumping cylinders connected to said conduits, a pipe connectedto said conduits, a by-pass pipe connected at its ends to said firstnamed pipes and having spaced one-way valves, said first named pipesbeing provided withl one-way valves between the ends of Ysaid bypasspipes, a relief valve establishing communication between theintermediate ortions of said first and second named plpes and beinglocated between the valves in the pipes, and a reservoir having pipesconriected to said conduits, the pipes of said reservoir being providedwith one-way valves. v

A5. In combination, a pump having a working piston, actuating pistonsconnected to the working piston o f said pump, cylinders for saidactuating pistons, pressure pipes connected to said cylinders andcontainingv cplumnsof fluid, means for pulsating said columns 'of fiuidwhereby to reciprocate the actuating pistons and consequentlyreciprocate the working pistons of the pump, means connected with thepressure pipes for repleni'shing automatically the supply of f'luid inthe pressure pipes, and an equalizing arrangement between the pressurepipes including an equalizing pipe connecting said 'pressure pipes, abypass connected at' its ends and at its intermediate portion to saidequalizing pipe and one-wav valves located` in the first named pipe andin the bypass pipe between the end and intermediate connections.

'JOHN LIONEL SHAFER.

